Bathtub



FIG. 1 is a left side elevational view of a bathtub showing my new design the right side being a mirror image of the left side;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view taken thereof; and,

FIG. 6 is a cross sectional view taken on line VI--VI of FIG. 2. 

The ornamental design for a bathtub, as shown and described. 